I love this quote (among others) from a 1996 interview with David Foster Wallace:
And I know that when I started this book I wanted--I had very vague and not very ambitious...ambitions, and one was I wanted to do something really sad. I'd done comedy before, I wanted to do just something really sad and I wanted to do something about what was sad about America.
Which "this book", i.e. Infinite Jest, definitely is, i.e. sad, and which reminds me--again--that I really want to re-read it. One of these days, I guess.